Differentiation based power transmission network anti-disaster ability planning method

Abstract

The invention discloses a differentiation based power transmission network anti-disaster ability planning method which is used for improving an anti-disaster ability of a power transmission network when a meteorological disaster occurs. The differentiation based power transmission network anti-disaster ability planning method comprises the steps of: firstly, developing an IEEE standard based tri-state meteorological condition to obtain a relationship between a fault rate of a power transmission line at different anti-disaster protection levels and the meteorological disaster; obtaining a fragility index and a goal by utilizing Monte Carlo simulation and an optimized load shedding algorithm. The fragility index and a planned construction cost serve as an objective function of multi-goal power transmission network planning; an NSGA-II algorithm is used for obtaining optimal Pareto disaggregation of a power distribution network planning scheme and is used for decision-making in the later period. The verification shows that the provided power distribution network planning method can determine the anti-disaster protection level of each power distribution line exactly, accordingly improves the anti-disaster ability of the power distribution network efficiently when the meteorological disaster occurs, meanwhile reduces line construction cost to the maximum extent and achieves important reference value for the planning of the power distribution network in the environment where meteorological disasters occur frequently.

Description

technical field [0001] The invention relates to a transmission network planning method, in particular to a differentiation-based transmission network disaster resistance planning method. Background technique [0002] In recent years, with the deteriorating climate and environment, meteorological disasters have become more frequent. Once an extreme weather disaster occurs, the failure rate of transmission lines will increase sharply, and the power system may cause large-scale power outages, resulting in huge economic losses. [1,2] . For example, in January 1998, a severe hail disaster hit Ontario and Quebec in Canada, as well as parts of the northeastern United States. The massive power outage is considered the worst natural disaster in Canadian history. During the incident, more than 4.7 million Canadians and 500,000 Americans lost power, causing huge economic losses [3] . Similar serious natural disasters also occurred in southern China at the beginning of 2008. Transm...

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Problems solved by technology

However, indiscriminately improving the disaster resistance protection level of all transmission lines, and then pursuing the reliability of network operation when disasters occur, is uneconomical from the perspective of power grid planning.

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